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The turbines in a hydroelectric plant are fed by water falling from a 50-m height. Assuming 91% efficiency for conversion of potential to electrical energy, and 8% loss of the resulting power in transmission, what is the mass flowrate of water required to power a 200-watt light bulb?
Soft drinks are commonly sold in aluminium containers. How a lot of such containers are thrown away or recycled each year by U.S. consumers.
A Carnot engine has an efficiency of 0.361, and the temperature of its cold reservoir is 406 K. (a) Determine the temperature of its hot reservoir. (b) If 5950 J of heat is rejected to the cold reservoir, what amount of heat is put into the engine..
What is the coefficient of static friction
What is an acceleration of the car
A particle moving along the x axis in simple harmonic motion starts from its equilibrium position, Determine the maximum speed and the earliest time
a girl who weighs 720 N rides on a FErris wheel of radius 7.5 m. when at the top of the wheel her effective weight is 600 N. Find out her speed and the angular speed of the wheel
Two pellets, each with charge 5 microcoulomb (1 microcoulomb = 0.000001 coulombs), are located 0.5 m apart. What is electrical force between the charges.
The other end is attaced to a 3 kg disk moving in uniform circular motion on the table, which stretches the spring by 1 cm. Note: Friction is negligibe. Illustrate what is the work done on the disk by the spring during one full circle?
Briefly describe how the resulting interference pattern will differ for the various types of particles passing through: protons, electrons, neutrinos (mass close to zero) and photons. Assume that the distribution of particle energies is the same f..
A uniform electric field of magnitude 271 V/m is directed in the negative x direction. A +12.7 ?C charge moves from the origin to the point (x, y) = (15.5cm, 46.0 cm). What was the change in the potential energy of this charge?
Find out the gravitational potential energy of the child-Earth system relative to the child's lowest position at the following times.
A 1700kg car travelling at a speed of 40m/s skids to the halt on wet concrete where f_k = 0.3. How long are the skid marks.
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